High Risk OB Flashcards
What is Dilation?
Extent of cervical dilation from 1-10cm
What is Effacement?
Percent of thickness of the cervix. Normally 2 cm thick and thins during labor. When thinned to 1 cm patient is 50% effaced.
What is Lie?
Longitudinal orientation of fetus in relation to longitudinal orientation of mother.
What is Station?
Fetal head in relation to mother’s pubic bone and is expressed as - or + number in cm.
What is Presentation?
What is attempting to emerge first? Cephalic, Breech, or Shoulder.
What are baseline Fetal Heart Tones?
120-160 /min
What is the single most important predictor of fetal well being?
1 cause of poor variability is fetal hypoxia
Variability (should be between 10-15 bpm)
What causes poor variability?
Fetal hypoxia
Smoking
Sedatives/analgesics administered to mom Extreme prematurity
Fetal sleep.
What are Accelerations?
Usually associated with fetal movement and CNS response to stimuli.
Usually good, Hypoxic fetus with metabolic acidosis cannot accelerate the heart.
Early Decelerations
Typical vasal response to squeezing of the head caused by strong contractions.
Usually ok if occurring at same time as contractions.
Late Decelerations
Indicate uteroplacental insufficiency causing fetus to experience a hypoxic bradycardia.
BAD
What are Late Decelerations commonly associated with?
Pregnancy induced hypertension
Diabetes
Smoking
Late deliveries
Variable Decelerations
Cord compression commonly occurring during contractions.
Look for cord problems (prolapse, short, entanglement, nuchal).
Typically V or W shaped waveforms on monitor.
What is Shouldering?
Deceleration followed by a short Acceleration to compensate.
Good thing!
Sinusoidal variation
Typical of Fetal hypovolemia or anemia.
Caused by accidental tap of umbilical cord during amniocentesis, fetomaternal transfusion, or placental abruption.
Very Bad
Fetal Heart Rate Bradycardia
<120 for 5-10 minutes
Most common cause is hypoxia
Fetal Heart Rate Tachycardia
> 160 for >10 minutes
Most common cause is maternal fever (sepsis)
Factors contributing to fetal distress (6)
Hypertonic or tetanic contractions (Discontinue oxytocin)
Rule out cord prolapse
Assure fetal oxygenation (Give mom high flow O2)
Maternal hypotension (250-500 ml bolus)
Placental abruption (Trauma, bleeding)
Change positions (Left lateral recumbent)
S/S of imminent delivery
Vaginal bleeding Contractions less than Q10 Increasing intensity of contractions Urge to push Crowning
Preterm Labor Tocolytics
Terbutaline (0.25 mg SQ Q15) Magnesium Sulfate (4-6G bolus over 15 min, 2 G/hr drip)
S/S of Magnesium Toxicity and treatment
Decreased deep tendon reflexes
Decreased BP
Decreased LOC
Respiratory depression
Give calcium chloride, push fluids to cause diuresis
Ectopic Pregnancy
Every woman of child bearing age with acute abdominal complaints is an ectopic pregnancy until proven otherwise.
Cross match blood, Give Rhogam if mom is RH-
Who is most at risk for Pregnancy induced hypertension?
African American Females
Signs of pre-eclampsia
Hypertension
Proteinuria
Edema
HELLP syndrome
Hemolysis
Elevated Liver enzymes
Low Platelet count
Eclampsia Treatment
Give Diazepam PRN for seizure activity with MgSo4 (Magnesium Sulfate)